Preparation technology of reinforced silicone airway stent

Abstract

The invention discloses a preparation technology of a reinforced silicone airway stent. The preparation technology of the reinforced silicone airway stent comprises the following steps: in an environment at the temperature of 37 DEG C, placing a woven nickel-titanium memory alloy annular skeleton into a mould before injection moulding of a silicone stent, wherein the thickness of the wall surface of the silicone stent is 1-1.5mm, and the distance between a metal wire as well as an outer wall surface and an inner wall surface is 0.3-0.5mm; and fixing the head and the tail of the mould by utilizing an extended metal wire, and carrying out silicone injection moulding, wherein an anti-slip circular projection is arranged outside the silicone stent, the projection is located at a depression of an airway cartilaginous ring, and the projection thickness is 1-2mm. The reinforced silicone airway stent disclosed by the invention is in a contraction state before being implanted into a human body and can be expanded to predetermined dimensions in the environment at the temperature of 37 DEG C after being implanted into an airway of a patient. Therefore, the advantages of the silicone support are reserved, and radial supporting strength is also enhanced.

Description

technical field [0001] The invention belongs to the field of human airway implant interventional medical devices, and in particular relates to a preparation technology of a reinforced silicone airway stent. Background technique [0002] In recent years, there are more and more airway diseases caused by various benign and malignant diseases, trauma, tracheotomy or intubation, such as airway stenosis and tracheal wall collapse. Clinically, stent implantation is usually used to expand rapidly airway, relieves dyspnea. Since Trendelenburg and Bond placed T-shaped tubes for the treatment of airway stenosis in the 1890s, researchers have been working on the development of airway stents, using a variety of materials to design a variety of airway stents. Currently, there are two main categories of commonly used: 1) Silicone tubular stents, including: Dumon stents, T-tube stents, Dynamic stents, etc.; 2) Metal mesh stents: including: Palmaz stents, Stecker stents, Ultrflex stents, d...

AI Technical Summary

Problems solved by technology

[0003] (1) The support strength of the silicone stent is insufficient, and it is difficult to open it for patients with severe airway stenosis, and the incidence of displacement is high;

[0004] (2) Metal mesh stents often lead to excessive hyperplasia of granulation tissue after implantation, which will lead to granulation in the mesh of the stent and cannot be removed;

[0005] (3) Metal covered stents often cause problems such as displacement and secretion retention

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